A television show (originally from the UK, remade for US audiences) about a criminal psychologist named Fitz - who probably has deeper problems than his cases. He helps the police solve freaky murders, by smoking and putting out a stream of often non-sensical psychobabble, then suddenly cutting through it all with simple but harshly worded insights.

Played in the UK by Robbie Coltrane, I don't know who plays the part in the US version.
Certainly the UK version was cool, worth catching a repeat. I read somewhere that the US version had been neutered and was kinda shit. But then UK reviews always say that about US adaptations of shows, so I can't judge.

One who breaks security on a system. Coined
ca. 1985 by hackers in defense against journalistic misuse of
hacker (q.v., sense 8). An earlier attempt to establish
`worm' in this sense around 1981-82 on Usenet was largely a
failure.

Use of both these neologisms reflects a strong revulsion against
the theft and vandalism perpetrated by cracking rings. The
neologism "cracker" in this sense may have been influenced not so
much by the term "safe-cracker" as by the non-jargon term
"cracker", which in Middle English meant an obnoxious person (e.g.,
"What cracker is this same that deafs our ears / With this
abundance of superfluous breath?" - Shakespeare's King John, Act
II, Scene I) and in modern colloquial American English survives as
a barely gentler synonym for "white trash".

While it is expected that any real hacker will have done some
playful cracking and knows many of the basic techniques, anyone
past larval stage is expected to have outgrown the desire to
do so except for immediate, benign, practical reasons (for example,
if it's necessary to get around some security in order to get some
work done).

Thus, there is far less overlap between hackerdom and crackerdom
than the mundane reader misled by sensationalistic journalism
might expect. Crackers tend to gather in small, tight-knit, very
secretive groups that have little overlap with the huge, open
poly-culture this lexicon describes; though crackers often like to
describe themselves as hackers, most true hackers consider
them a separate and lower form of life.

Ethical considerations aside, hackers figure that anyone who can't
imagine a more interesting way to play with their computers than
breaking into someone else's has to be pretty losing. Some
other reasons crackers are looked down on are discussed in the
entries on cracking and phreaking. See also
samurai, dark-side hacker, and hacker ethic. For a
portrait of the typical teenage cracker, see warez d00dz.

Cracker is a slang term with innumerable meanings. Today it is most often used as a more technical term for a malevolent hacker, but in the past is was used as slang for a bean (1900), a dollar (1933), a remarkable person (1863), or most frequently, as a derogatory term for a white person. The first recorded use of these sense was in 1766, when it was used to refer to the lawless backwoodsmen of the American frontier.

"I should explain to your Lordship what is meant by Crackers; a name they have got from being great boasters; they are a lawless set of rascalls on the frontiers of Virginia, Maryland, the Carolinas, and Georgia, who often change their places of abode."

-- From a letter dated June 27, 1766 from Captain Gavin Cochrane to the Earl of Dartmouth.

This usage probably comes from the use of crack from the 1500s onward to mean a boast, the same meaning that gave us the phrase 'not what it's cracked up to be' and the word 'wisecrack'. It continued to be used to refer to a particularly unsavory country bumpkin until at least the 1980s, and may well still be used in this sense today, although I have not heard it used so myself. It has much the same meaning as redneck or perhaps white trash, and implies that one is loud, uncouth, unhygienic, untrustworthy, poor, and has a strong back-country accent.

In the early 1920s it became common for cracker to refer instead to a white racist (that is, a white person who was racist against blacks) by African-American writers during the Harlem Renaissance. By the late 1960s, the term was widely recognized as one of the more offensive terms specifically, and for the most part, exclusively, used by black persons to insult a white person. (Honkey was also popular during this time.) This sense largely faded out by the 1980s, although it is still used in this sense today. These days it is generally not seen as too terribly offensive, and has lost some of the overtones of calling someone a racist. It is, however, still rude.

While cracker has been used at varies times and places in America to mean something good, nice, or impressive, including the famous crackerjack, this usage has fallen out of popularity. Wertperch informs me that it is still used in the positive sense in the UK. "'Cracker' is used in parts of the UK for something really good, or an attractive woman. 'That's a cracker!' means a superlative; 'She's a cracker!' means she's just gorgeous."